Fan and air purifier

Abstract

The draught fan comprises a shell, the shell is provided with an air inlet, a first cavity and an air outlet, the first cavity is located between the air inlet and the air outlet, and the first cavity communicates with the air inlet and the air outlet; the volute is arranged in the first cavity and provided with an air duct, the air inlet end of the air duct communicates with the air inlet, and the air outlet end of the air duct communicates with the air outlet; the impeller is rotatably arranged in the air duct; the driving part is arranged on the shell, the output end of the driving part is connected with the impeller, and the driving part is used for driving the impeller to rotate; the air duct is provided with an expansion section, the expansion section is located at the end close to the air inlet end of the air duct, and the cross section of the expansion section is gradually increased in the airflow flowing direction. The air flow diffusion area at the impeller can be increased, the speed of air flow is evenly reduced, air flow impact and vortex generation can be reduced, and therefore operation noise can be remarkably reduced.

Description

Technical Field

[0001] This application relates to the field of air purification technology, and more particularly to a fan and an air purifier. Background Technology

[0002] The desktop kitchen fume purifier is a compact kitchen fume treatment device designed specifically for homes and small restaurants. Its portable design allows for flexible placement around the stovetop, achieving real-time and efficient purification of cooking fumes.

[0003] Currently, due to technological limitations, traditional desktop kitchen exhaust purifiers have certain pain points in use: because the cross-section of the fan duct is relatively narrow, the airflow will generate a large impact when passing through, which will lead to significant noise during equipment operation and affect the user experience. Utility Model Content

[0004] This application provides a fan and an air purifier to solve the problem of excessive operating noise in related technologies. The technical solution is as follows:

[0005] In a first aspect, embodiments of this application provide a fan, including:

[0006] The outer casing has an air inlet, a first cavity, and an air outlet. The first cavity is located between the air inlet and the air outlet and is connected to the air inlet and the air outlet.

[0007] A volute is disposed within the first cavity. The volute has an air duct, the air inlet of which is connected to the air inlet, and the air outlet of which is connected to the air outlet.

[0008] Impeller, the impeller being rotatably disposed within the air duct; and

[0009] A drive component is disposed on the housing, and the output end of the drive component is connected to the impeller. The drive component is used to drive the impeller to rotate.

[0010] The air duct is provided with an expansion section, which is located at one end near the air inlet of the air duct, and the cross-section of the expansion section gradually increases in the direction of airflow.

[0011] In one embodiment, the wall of the expansion section is arc-shaped.

[0012] In one embodiment, the impeller has an arcuate portion that is spaced apart from the wall of the expansion section, and the curvature of the arcuate portion is adapted to the curvature of the expansion section.

[0013] In one embodiment, the outer casing is provided with a positioning protrusion, which is arranged around the air inlet and inserted into the air inlet end of the air duct.

[0014] In one embodiment, there are multiple air inlets, which are arranged at intervals around the center line of the air duct.

[0015] In one embodiment, the fan further includes:

[0016] The rear cover is connected to the volute and covers the air outlet. The rear cover has a fixing part and multiple air outlets. The fixing part is connected to the drive component. The multiple air outlets are arranged around the fixing part and are all connected to the air duct.

[0017] In one embodiment, the impeller has a receiving cavity located at one end near the air outlet, the receiving cavity accommodating the drive component.

[0018] In one embodiment, the volute is provided with reinforcing ribs, which are arranged around the air inlet end of the air duct.

[0019] In one embodiment, the outer casing further has a second cavity, the second cavity and the first cavity are arranged sequentially along the airflow direction, one end of the second cavity is connected to the outside, and the other end of the second cavity is connected to the air inlet, the second cavity is used to accommodate the filter component.

[0020] Secondly, embodiments of this application provide an air purifier, including the air purifier described above.

[0021] The advantages or beneficial effects of the above technical solutions include at least the following:

[0022] The fan of this utility model has an expansion section in the air duct, located at the air inlet end near the air duct. The cross-section of the expansion section gradually increases in the direction of airflow, forming a conical expansion structure. This increases the airflow diffusion area at the impeller, making the airflow decelerate evenly, reducing airflow impact and eddy current generation, thereby significantly reducing operating noise. At the same time, it also reduces the airflow resistance at the air inlet end of the air duct, reducing energy loss and thus reducing the energy consumption of the drive components. In addition, since the outer shell integrates the functions of air inlet, cavity, and air outlet, and the volute is built into the outer shell, the air duct inside the volute cooperates with the impeller, resulting in a reasonable layout that saves space while ensuring functional integrity.

[0023] The above overview is for illustrative purposes only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments, and features described above, further aspects, embodiments, and features of this application will become readily apparent from the accompanying drawings and the following detailed description. Attached Figure Description

[0024] In the accompanying drawings, unless otherwise specified, the same reference numerals throughout the various drawings denote the same or similar parts or elements. These drawings are not necessarily drawn to scale. It should be understood that these drawings depict only some embodiments disclosed in this application and should not be construed as limiting the scope of this application.

[0025] Figure 1 This is a three-dimensional structural diagram of the fan of this utility model;

[0026] Figure 2 This is a cross-sectional view of the fan of this utility model;

[0027] Figure 3 This is an exploded view of the fan of this utility model;

[0028] Figure 4 This is a three-dimensional structural diagram of the outer shell in this utility model;

[0029] Figure 5 This is a cross-sectional view of the outer casing of this utility model;

[0030] Figure 6 This is a three-dimensional structural diagram of the air purifier of this utility model;

[0031] Figure 7 This is a cross-sectional view of the air purifier of this utility model;

[0032] Figure 8 This is an exploded view of the air purifier of this utility model.

[0033] Figure Labels

[0034] 1. Outer shell; 11. Air inlet; 12. First cavity; 13. Air outlet; 14. Positioning protrusion; 15. Second cavity; 16. First connecting hole; 2. Volute; 21. Air duct; 211. Expansion section; 22. Reinforcing rib; 23. Second connecting hole; 24. Third connecting hole; 3. Impeller; 31. Arc-shaped part; 32. Receiving cavity; 4. Drive component; 5. Rear cover; 51. Fixing part; 52. Air outlet; 53. Fourth connecting hole; 6. Condensation filter; 7. Composite filter element; 71. Oil separator filter element; 72. Folded paper filter element; 8. Middle shell; 81. First positioning groove; 9. Front shell; 91. Second positioning groove. Detailed Implementation

[0035] In the following description, only certain exemplary embodiments are briefly described. As those skilled in the art will recognize, the described embodiments can be modified in various ways without departing from the spirit or scope of this application. Therefore, the drawings and description are considered to be exemplary in nature and not restrictive.

[0036] See Figures 1-8 This invention illustrates a preferred embodiment of a fan, comprising:

[0037] The outer casing 1 is provided with an air inlet 11, a first cavity 12 and an air outlet 13. The first cavity 12 is located between the air inlet 11 and the air outlet 13 and is connected to the air inlet 11 and the air outlet 13.

[0038] The volute 2 is located inside the first cavity 12. The volute 2 has an air duct 21. The air inlet end of the air duct 21 is connected to the air inlet 11, and the air outlet end of the air duct 21 is connected to the air outlet 13.

[0039] Impeller 3, which is rotatably disposed within air duct 21; and

[0040] Drive component 4 is mounted on housing 1. The output end of drive component 4 is connected to impeller 3. Drive component 4 is used to drive impeller 3 to rotate. The rotation of impeller 3 can guide airflow from air inlet 11 to air outlet 13, forming a directional airflow path from air inlet 11 to air outlet 13, thereby improving airflow efficiency.

[0041] The air duct 21 is provided with an expansion section 211, which is located at one end near the air inlet end of the air duct 21. The cross-section of the expansion section 211 gradually increases in the direction of airflow.

[0042] The fan of this utility model has an expansion section 211 in the air duct 21. The expansion section 211 is located at one end near the air inlet end of the air duct 21. The cross-section of the expansion section 211 gradually increases in the direction of airflow, forming a conical expansion structure. This can increase the airflow diffusion area at the impeller 3, so that the airflow is reduced uniformly. This can reduce airflow impact and eddy current generation, thereby significantly reducing operating noise. At the same time, it can also reduce the airflow resistance at the air inlet end of the air duct 21, reduce energy loss, and thus reduce the energy consumption of the drive component 4. In addition, since the outer shell 1 integrates the functions of air inlet, cavity and air outlet, and the volute 2 is built into the outer shell 1, the air duct 21 inside the volute 2 cooperates with the impeller 3. The layout is reasonable, saving space while ensuring functional integrity.

[0043] In one embodiment, the wall of the expansion section 211 is arc-shaped to reduce airflow friction resistance and further reduce operating noise.

[0044] In one embodiment, the impeller 3 has an arcuate portion 31, which is spaced apart from the wall of the expansion section 211. The curvature of the arcuate portion 31 is adapted to the curvature of the expansion section 211 to reduce airflow friction resistance and further reduce operating noise.

[0045] See Figure 2 In one embodiment, the outer shell 1 is provided with a positioning protrusion 14, which surrounds the air inlet 11 and is inserted into the air inlet end of the air duct 21. That is, the positioning protrusion 14 and the air inlet end of the air duct 21 cooperate to play a positioning role, ensuring accurate alignment of the volute 2 during installation, and improving the connection stability between the volute 2 and the outer shell 1.

[0046] In one embodiment, the outer casing 1 has a first connecting hole 16, the volute 2 has a second connecting hole 23, and the fan also includes a first fastener (not shown in the figure). The head of the first fastener abuts against the outer casing 1, and the rod of the first fastener passes through the first connecting hole 16 and is screwed to the second connecting hole 23, so as to reliably connect the volute 2 and the outer casing 1 together, and at the same time, facilitate the disassembly and assembly of the volute 2.

[0047] See Figure 1 In one embodiment, there are multiple air inlets 11, which are arranged at intervals around the center line of the air duct 21 to form an air intake grille. This ensures smooth airflow and also prevents accidental contact with the impeller 3 when replacing the filter components, thus providing a safety protection function.

[0048] It can be understood that the centerline of the air duct 21 is the centerline of the air duct 21 along the direction of airflow.

[0049] In one embodiment, the fan further includes:

[0050] The rear cover 5 is connected to the volute 2 and covers the air outlet 13. The rear cover 5 has a fixing part 51 and multiple air outlet holes 52. The fixing part 51 is connected to the drive component 4, and the multiple air outlet holes 52 are arranged around the fixing part 51, all of which are connected to the ventilation duct 21. Specifically, because the rear cover 5 has a fixing part 51 that is directly connected to the drive component 4, it ensures that the drive component 4 is securely installed, reduces operational vibration, and extends its service life. Furthermore, because the rear cover 5 covers the air outlet 13, it prevents the entry of external foreign objects and protects internal components (such as the impeller 3) from interference. It also prevents users from accidentally touching the impeller 3 and injuring themselves, thus providing protection. Additionally, the multiple spaced air outlet holes 52 disperse the airflow, avoiding localized high pressure or noise caused by concentrated airflow. Moreover, the connection design between the rear cover 5 and the volute 2 facilitates disassembly and maintenance. In summary, the rear cover 5 integrates the functions of fixing the drive component 4, guiding airflow, and providing protection, simplifying the structure and saving space.

[0051] In one embodiment, the volute 2 has a third connecting hole 24, the rear cover 5 has a fourth connecting hole 53, and the fan also includes a second fastener. The head of the second fastener abuts against the volute 2, and the rod of the second fastener passes through the third connecting hole 24 and is screwed to the fourth connecting hole 53, so as to reliably connect the rear cover 5 and the volute 2 together. At the same time, it facilitates the disassembly and assembly of the rear cover 5, thereby facilitating the cleaning of the rear cover 5.

[0052] See Figures 2-3 In one embodiment, the impeller 3 has a receiving cavity 32 located at one end near the air outlet 13. The receiving cavity 32 accommodates the drive component 4, thereby enabling the drive component 4 to be built into the impeller 3, improving the space utilization of the impeller 3 and saving space.

[0053] In one embodiment, the driving component 4 may be a motor or other driving component capable of driving the impeller 3 to rotate.

[0054] See Figure 8 In one embodiment, the volute 2 is provided with reinforcing ribs 22, which are arranged around the air inlet end of the air duct 21 to increase the structural strength of the air inlet end of the air duct 21 and prevent the air inlet end of the air duct 21 from being deformed by force.

[0055] See Figure 8 In one embodiment, there are multiple reinforcing ribs 22, which are arranged at intervals along a direction perpendicular to the airflow direction. Adjacent reinforcing ribs 22 are connected together by connecting components to further strengthen the structural strength of the air inlet end of the air duct 21.

[0056] In one embodiment, the outer casing 1 further has a second cavity 15. The second cavity 15 and the first cavity 12 are arranged sequentially along the airflow direction. One end of the second cavity 15 is connected to the outside, and the other end of the second cavity 15 is connected to the air inlet 11. The second cavity 15 is used to accommodate the filter components to improve the utilization rate of the outer casing 1, which can simplify the structure and save space.

[0057] See Figures 6-8 This invention illustrates an air purifier according to a preferred embodiment of the present invention, which includes the air purifier described above.

[0058] The air purifier of this utility model, due to the use of the aforementioned fan, also has an expansion section 211 based on the air duct 21. The expansion section 211 is located at one end near the air inlet end of the air duct 21. The cross-section of the expansion section 211 gradually increases in the direction of airflow, forming a conical expansion structure, which can increase the airflow diffusion area at the impeller 3, so that the airflow is reduced evenly, reducing airflow impact and eddy current generation, thereby significantly reducing operating noise. At the same time, it can also reduce the airflow resistance at the air inlet end of the air duct 21, reduce energy loss, and thus reduce the energy consumption of the drive component 4. In addition, since the outer shell 1 integrates the functions of air inlet, cavity, and air outlet, and the volute 2 is built into the outer shell 1, the air duct 21 inside the volute 2 cooperates with the impeller 3, which is reasonable in layout, saves space and ensures functional integrity.

[0059] See Figures 6-8 In one embodiment, the filter element includes:

[0060] Condensation filter 6 is located inside the second cavity 15 and is used to evenly distribute and condense the intake airflow.

[0061] The composite filter element 7 is located within the second cavity 15 and is used to filter liquid pollutants, aerosol particles, and gaseous pollutants in the condensed airflow. Thus, under the action of the impeller 3, the airflow around the air purifier can be ensured to flow smoothly into the outer casing 1, effectively reducing the amount of flue gas escaping. The airflow inside the outer casing 1 passes sequentially through the condenser filter 6 and the composite filter element 7, and is finally discharged from the air outlet 13 of the outer casing 1. The condenser filter 6 can uniformly condense and treat the airflow, reducing aerodynamic noise and wind resistance caused by airflow turbulence. It can also lower the temperature of the subsequent composite filter element 7 in contact with the polluted airflow, thereby improving filtration efficiency and the lifespan of the composite filter element 7. The composite filter element 7 can filter liquid pollutants, aerosol particles, and gaseous pollutants in the condensed airflow, thereby achieving water and oil separation, filtering particulate matter, volatile organic pollutants, and odors, achieving highly efficient purification of oil fumes in the airflow, and effectively improving oil fume purification efficiency.

[0062] In one embodiment, the condenser filter 6 is composed of multiple layers of perforated metal sheets, which plays a role in uniformly distributing and pre-treating the intake airflow, thereby reducing aerodynamic noise caused by airflow turbulence and excessive local wind resistance, and lowering the temperature of the subsequent composite filter element 7 in contact with the polluted airflow, thereby improving filtration efficiency and the lifespan of the composite filter element 7.

[0063] See Figure 7 In one embodiment, the composite filter element 7 includes:

[0064] Oil-water separator 71 is used to filter liquid contaminants in the condensed airflow, removing water and oil droplets to ensure the filtration effect of the subsequent paper filter 72 is not affected by oil and water, thus extending its service life; and

[0065] Origami filter element 72 and oil separator filter element 71 are arranged sequentially along the airflow direction. Origami filter element 72 is used to filter aerosol particles and gaseous pollutants in the airflow after it has been treated by oil separator filter element 71, thereby filtering particulate matter, volatile organic pollutants, and odors from the airflow after water and oil separation. Oil separator filter element 71 removes liquid pollutants (such as water droplets and oil droplets) through mechanical interception (such as inertial impaction and fiber adsorption), reducing the liquid load on subsequent ovarian filter element 72. Origami filter element 72 focuses on treating aerosol particles and gaseous pollutants (such as particulate matter, volatile organic pollutants, and odors), achieving staged filtration and ensuring that each filter element operates under optimal conditions, effectively improving filtration efficiency.

[0066] See Figure 7 In one embodiment, the oil-separating filter element 71 includes multiple wet curtain papers arranged sequentially along a direction perpendicular to the airflow direction. An air passage is formed between each pair of adjacent wet curtain papers, and the air passage connects to the folded filter element 72. The cross-section of the wet curtain paper is corrugated, that is, the wet curtain paper has a corrugated structure, which gives the wet curtain paper better structural strength and can also play a certain role in uniformly distributing the airflow. It can absorb water and oil while maintaining structural stability and strength, thereby preventing local airflow turbulence, removing water and oil from the condensed airflow, removing water and oil droplets from the airflow, ensuring that the filtration effect of the subsequent folded filter element 72 is not affected by oil and water, and extending its service life.

[0067] In one embodiment, the origami filter element 72 is made by folding and gluing multiple layers of composite origami. The main filter layers include, but are not limited to, meltblown cloth, filter cotton, carbon fiber cloth, carbon fiber, ceramic filter membrane, etc., and its main function is to filter particulate matter, volatile organic pollutants, odors, etc.

[0068] See Figures 7-8 In one embodiment, the air purifier further includes:

[0069] The middle shell 8 is connected to the outer shell 1 and is located inside the second cavity 15. The middle shell 8 has a first positioning groove 81, which is connected to the second cavity 15. The first positioning groove 81 is adapted to the composite filter element 7, that is, the composite filter element 7 and the first positioning groove 81 cooperate to realize the installation and positioning of the composite filter element 7, ensuring that the composite filter element 7 is accurately aligned during installation, avoiding offset or loosening, thereby ensuring that the composite filter element 7 can be stably installed on the shell.

[0070] The front shell 9 is connected to the middle shell 8 and is located inside the second cavity 15. The front shell 9 has a second positioning groove 91, which is connected to the second cavity 15. The second positioning groove 91 is adapted to the condenser filter 6, that is, the condenser filter 6 and the second positioning groove 91 cooperate to realize the installation and positioning of the condenser filter 6, ensuring that the condenser filter 6 is accurately aligned during installation and avoiding offset or loosening, thereby ensuring that the condenser filter 6 can be stably installed on the shell. The first mounting groove, the second mounting groove and the air duct 21 form an airflow channel.

[0071] In one embodiment, the housing 1 has a fifth connection hole;

[0072] The middle shell 8 has a sixth connecting hole, which is connected by a third fastener and a fifth connecting hole to facilitate the connection of the middle shell 8 and the outer shell 1 together.

[0073] Specifically, the head of the third fastener abuts against the middle shell 8, and the rod of the third fastener passes through the sixth connecting hole and is screwed to the fifth connecting hole to facilitate the disassembly and assembly of the middle shell 8, thereby improving the disassembly and assembly efficiency of the composite filter element 7 and making it easier to replace the composite filter element 7.

[0074] In one embodiment, the middle shell 8 has a first mounting groove, and a first magnetic attraction element (not shown in the figure) is provided in the first mounting groove;

[0075] The front housing 9 has a second mounting groove, in which a second magnetic component is provided. The second magnetic component cooperates with the first magnetic component to connect the front housing 9 and the middle housing 8 together, enabling tool-free disassembly and assembly of the front housing 9, which greatly improves the disassembly and assembly efficiency of the front housing 9, thereby greatly improving the disassembly and assembly efficiency of the condenser filter 6 and making it more convenient to replace the condenser filter 6.

[0076] In the description of this specification, the references to terms such as "one embodiment," "some embodiments," "example," "specific example," or "some examples," etc., indicate that a specific feature, structure, material, or characteristic described in connection with that embodiment or example is included in at least one embodiment or example of this application. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples. Moreover, without contradiction, those skilled in the art can combine and integrate the different embodiments or examples described in this specification, as well as the features of those different embodiments or examples.

[0077] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one of that feature. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0078] The above are merely specific embodiments of this application, but the scope of protection of this application is not limited thereto. Any person skilled in the art can easily conceive of various variations or substitutions within the technical scope disclosed in this application, and these should all be included within the scope of protection of this application. Therefore, the scope of protection of this application should be determined by the scope of the claims.

Claims

1. A fan, characterized in that, include: The outer casing has an air inlet, a first cavity, and an air outlet. The first cavity is located between the air inlet and the air outlet and is connected to the air inlet and the air outlet. A volute is disposed within the first cavity. The volute has an air duct, the air inlet of which is connected to the air inlet, and the air outlet of which is connected to the air outlet. An impeller, which is rotatably disposed within the air duct; as well as A drive component is disposed on the housing, and the output end of the drive component is connected to the impeller. The drive component is used to drive the impeller to rotate. The air duct is provided with an expansion section, which is located at one end near the air inlet of the air duct, and the cross-section of the expansion section gradually increases in the direction of airflow.

2. The fan according to claim 1, characterized in that, The wall of the expansion section is arc-shaped.

3. The fan according to claim 2, characterized in that, The impeller has an arc-shaped portion, which is spaced apart from the wall of the expansion section, and the curvature of the arc-shaped portion is adapted to the curvature of the expansion section.

4. The fan according to claim 1, characterized in that, The outer casing is provided with a positioning protrusion, which is arranged around the air inlet and inserted into the air inlet end of the air duct.

5. The fan according to claim 1, characterized in that, The number of air inlets is multiple, and the multiple air inlets are arranged at intervals around the center line of the air duct.

6. The fan according to claim 1, characterized in that, The fan also includes: The rear cover is connected to the volute and covers the air outlet. The rear cover has a fixing part and multiple air outlets. The fixing part is connected to the drive component. The multiple air outlets are arranged around the fixing part and are all connected to the air duct.

7. The fan according to claim 1, characterized in that, The impeller has a receiving cavity located at one end near the air outlet, and the receiving cavity accommodates the drive component.

8. The fan according to claim 1, characterized in that, The volute is provided with reinforcing ribs, which are arranged around the air inlet end of the air duct.

9. The fan according to claim 1, characterized in that, The outer casing also has a second cavity, which is arranged sequentially with the first cavity along the airflow direction. One end of the second cavity is connected to the outside, and the other end of the second cavity is connected to the air inlet. The second cavity is used to accommodate the filter component.

10. An air purifier, characterized in that, The air purifier includes any one of claims 1-9.

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